Independent evidence review
Nutrition is one of the most contested areas of public health. We exist to make the evidence clearer.
Evidence-rated reviews of nutritional ingredients and interventions. We tell you what the research shows, what it does not show, and which form the evidence actually applies to.
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Form-specific evidence
We distinguish between forms of the same ingredient. Evidence for one preparation does not automatically transfer to another.
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Honest about uncertainty
We include what the evidence does not show. Null findings and conflicting studies are reported, not omitted.
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Fully independent
No commercial sponsorship, no affiliate relationships. Conflicts of interest and funding sources are publicly disclosed.
From the evidence library
Browse all 52 entries →mental-healthEmerging
5-HTP
A serotonin precursor with a plausible mechanism and a genuinely limited evidence base. The safety considerations around drug interactions are more firmly established than the clinical benefits.
AdaptogenModerate
Ashwagandha
Growing but still moderate evidence base for stress and sleep outcomes. Extract type matters significantly -- KSM-66 and Sensoril are the evidence-based choices.
LongevityEmerging
Astaxanthin
A marine carotenoid with the most developed human evidence base among antioxidant supplements for skin ageing and photoprotection. Nine RCTs support modest improvements in skin moisture, elasticity, and wrinkle measures. A smaller cognitive signal exists across four positive RCTs. The evidence is geographically concentrated, largely sponsor-linked, and not independently replicated at scale.
Cognitive healthModerate
Bacopa Monnieri
Bacopa monnieri is an Ayurvedic herb with the most consistent evidence for improving delayed memory recall in healthy older adults. Trials are small and heterogeneous. Evidence in dementia is insufficient and no guidelines recommend its use.
How we assess evidence
Every claim carries an explicit rating: Strong, Moderate, Emerging, or Insufficient. Our methodology, appraisal tools, and rating decision rules are published in full.